object TestVal {
  def main(args: Array[String]): Unit = {
    val x = 20
    println(x)
    //>x = 200;
    val y = 100;
    val z = x.+(y)
    println(z)
    var a = 200;
    a = 400;
    println(a)

    var b: Int = 202
    println(b)
  }
}
